Introduction

Are you a Subaru owner struggling to locate the fill and check plugs for your CVT transmission and differential? Don’t worry; you’re not alone. The confusing placement of these plugs can lead to costly mistakes if not handled correctly. In this article, we’ll provide a step-by-step guide on how to properly fill and check the fluids in your Subaru CVT transmission and differential. By following these instructions, you can avoid damaging your transmission and ensure the longevity of your vehicle. So, let’s dive in!

Understanding the Plugs

Before we get into the detailed process, let’s identify the correct plugs for the CVT transmission and differential in your Subaru:

  1. CVT Transmission Assembly: The fill and check plug for the CVT fluid is located on the left-hand side of the vehicle, near the rear. It’s crucial to remember that this is the only plug you should be using for the CVT fluid.

  2. Drain Plug for CVT Transmission Fluid: The drain plug for the CVT transmission fluid can be found elsewhere on the transmission assembly. Make sure to locate the right plug to avoid complications.

  3. Differential Fluid: The front differential fluid requires gear oil, not CVT oil. It’s important to differentiate between the transmission and differential fluid plugs to prevent any mishaps.

  4. Differential Check Plug: To check the level of the differential, you need to locate the check plug. Remember, this plug is meant for the differential, not the CVT fluid.

  5. Differential Fill Plug: The fill plug for the differential is situated on the right-hand side of the vehicle, above the axle. This is the only plug you should use for the differential.

Step-by-Step Process for Filling and Checking Fluids

Now that we know the correct plugs for the CVT transmission and differential, let’s proceed with the step-by-step process to ensure a successful fluid check and fill:

CVT Transmission Fluid

  1. Purchase the Right Fluid: Before starting, make sure to buy the correct CVT fluid for your specific year and model of Subaru. Consult the Subaru manual or do some research to ensure you have the right fluid.

  2. Warm Up the Engine: Start your vehicle and let the engine warm up to approximately 95 to 120 degrees Fahrenheit. You can check the temperature using a temperature gun if desired.

  3. Drain the Fluid: Locate the drain plug for the CVT transmission fluid and open it. Allow the fluid to drain completely.

  4. Fill the Fluid: Once the fluid has drained, find the fill and check plug for the CVT fluid. Use a funnel to carefully pour in about four to five quarts of CVT fluid. Make sure not to overfill.

  5. Check the Level: With the fill plug securely back in place, start the engine and let it run for a few minutes. Then, open the check plug and wait for a small stream of fluid to trickle out. This indicates that the fluid level is correct.

  6. Finish Up: Once you have verified the fluid level, close the check plug and double-check that all plugs are properly tightened. Congratulations, you have successfully filled and checked the CVT transmission fluid in your Subaru!

Front Differential Fluid

  1. Drain the Fluid: Locate the drain plug for the front differential and open it to drain the fluid completely.

  2. Fill the Fluid: After draining the fluid, find the fill plug for the front differential and remove it. Using a funnel, pour in about one and a half quarts of gear oil.

  3. Check the Level: If you want to ensure the level of the differential is perfect, remove the plug for the differential check. This will allow you to check the fluid level visually.

  4. Final Check: Once you have checked the fluid level, securely place the check and fill plugs back in their respective positions. Ensure that all plugs are properly tightened.

Conclusion

Navigating the different plugs and fluids in your Subaru CVT transmission and differential can be confusing, but with the information provided in this article, you can confidently perform the necessary checks and fills. Remember, accuracy is crucial to avoid damaging your transmission and differential. Whenever possible, it is recommended to seek the assistance of a trusted mechanic or visit a Subaru dealership to ensure the job is done correctly. Don’t settle for shortcuts; your Subaru deserves the best care. Happy driving!